Rubber compositions containing polyorganosiloxanes as plasticizers
AssigneeSchill + Seilacher “Struktol” Aktiengesellschaft
InventorsVolker Börger, Dörte Becker, Theresia Klose, Uwe Dittrich
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Abstract
The invention relates to rubber compositions that are provided with polyorganosiloxanes as plasticizers. The rubber compositions can be vulcanized by means of a cross-linking resin and they are particularly suitable for use as curing bladders in the production of tires. The invention further relates to the use of polyorganosiloxanes as corresponding plasticizers.
Claims17
A process of using one or more modified polyorganosiloxane as a plasticizer in a rubber composition, the method comprising:
- combining the one or more modified polyorganosiloxane with rubber to form a combination;
- vulcanizing the rubber in the combination by vulcanizing with one or more crosslinking resin;
- and
- using the vulcanized rubber to form the rubber composition, wherein the rubber composition comprises the one or more modified polyorganosiloxane,
- wherein the one or more modified polyorganosiloxane contains 3 or more siloxane units and:
- one or more organic moiety R1, which have one or more carbon-carbon multiple bonds and at least 4 carbon atoms, and one or more alkyl radicals R2, wherein R2 has a chain length of from 5 to 50 carbon atoms and is longer that a chain length of R1;
- or
- two or more organic moieties R1, which have one or more carbon-carbon multiple bonds and at least 4 carbon atoms.
A method for producing a bladder for tyre production, the method comprising vulcanizing a rubber composition which contains one or more modified polyorganosiloxane by using one or more crosslinking resin, wherein the one or more modified polyorganosiloxane contains 3 or more siloxane units and one or more organic moieties R1, which have one or more carbon-carbon multiple bonds and at least 4 carbon atoms.
A bladder for tyre production, the bladder comprising a rubber composition vulcanized using a crosslinking resin, wherein the rubber composition comprises one or more modified polyorganosiloxane, wherein the one or more modified polyorganosiloxane contains 3 or more siloxane units and two or more organic moieties R1, which have one or more carbon-carbon multiple bonds and at least 4 carbon atoms.
Dependencies are inferred from the claim text.